DBTR – Regional Topographic Map 1:50.000

Automatic dispatch representation of the contents of the Regional Topographic Database current release at scale 1:50.000, with symbology analogous to the Regional Topographic Map 1:25000 Full monochrome version, in 400dpi raster format. Table metadata (e.g. Date of acquisition, etc.) are contained in the WMS “metadata_raster”. The use of modern digital technologies allows it to be constantly updated.本数据集为当前发布的1:5万比例尺区域地形数据库（Regional Topographic Database）内容的自动分发展示成果，其符号系统与1:2.5万全单色版区域地形图（Regional Topographic Map 1:25000）保持一致，采用400dpi栅格格式存储。表格形式的元数据（如数据获取日期等）存储于WMS（Web Map Service）服务的"metadata_raster"资源中。依托现代数字技术，该数据集可实现持续更新。